Into the Blue (2005)

"Into the Blue" is a high-stakes thriller set in the deep, shark-infested waters of the Bahamas. When young divers discover the wreckage of a cargo plane at the bottom of the sea, they believe their dream of buried treasure has come true. What they don't realise is that millions of dollars of illegal goods are in that sunken plane and a group of dangerous criminals are already desperately searching for it. As tensions mount and the friends begin to fight about what to do with their find, others get closer to discovering their secret - and the treasure hunters quickly become the hunted.

Official website: http://www.mgm.com/intotheblue